INVESTIGADORES
SIMONETTI Sandra Isabel
artículos
Título:
Adsorption of bentazone and imazapyc from water by using functionalized silica: experimental and computational analysis
Autor/es:
A. SPALTRO; S. SIMONETTI; S. LAURELLA; D. RUIZ; A. DIAZ COMPAÑY; A. JUAN; P. ALLEGRETTI
Revista:
JOURNAL OF CONTAMINANT HYDROLOGY
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2019 vol. 227 p. 103542 - 103550
ISSN:
0169-7722
Resumen:
In this study, silica and functionalized silica materials (3-aminopropyl and 3-mercapto derivatives) were successfully used for the removal of the pesticides bentazone and imazapyc from aqueous solutions. Adsorbent materials were characterized by BET isotherms and FT-IR spectroscopy (confirming the functionalization), and their equilibrium adsorption capacity was evaluated at different ionic strengths. It is observed that the maximum adsorption capacities decrease in the order 3-aminopropyl-derivative > silica >3-mercaptopropyl derivative. An increase in ionic strength produces an enhancement in the removal of pesticides. All isotherms are Ib-type and follow the Langmuir model, suggesting a monolayer physical adsorption process.
